Worn out engine
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Worn out engine

Worn out engine When buying a used car, you should pay attention to the transmission. This is due to the fact that its repair is quite expensive.

When buying a used car, you should pay attention to the transmission. This is due to the fact that its repair is quite expensive.

The power unit and gearbox must not be contaminated with oil, which implies oil leakage through worn seals. If this happens, it's worth looking at where the oil is leaking from: from under the valve cover gasket, cylinder head gasket, oil pan, ignition distributor, or possibly the fuel pump. However, when the engine is washed, this may indicate the desire of the seller to hide oil stains. Worn out engine

It is also recommended to remove the dipstick to check the amount of oil in the sump and put a few drops on a white sheet of paper. The dark color of the oil is natural. The oil should not be too thin, however, as there is a suspicion that gasoline has got into it. The cause may be damage to the fuel pump or injection device, which, however, is quite rare.

This diagnosis is confirmed by the smell of fuel after unscrewing the oil filler cap and dark, wet soot at the end of the exhaust pipe (fuel-air mixture too rich). The color of cocoa butter and its liquid consistency indicate that coolant has leaked into the oil as a result of a damaged cylinder head gasket or cylinder head failure. A coolant leak in the expansion tank confirms this diagnosis. In these two cases, the oil level on the dipstick is above the acceptable level.

Engine lubrication with oil mixed with gasoline or coolant causes accelerated wear of piston rings and cylinders, crankshaft and camshaft bearings. In this case, it is urgent to repair the power unit.

The clutch is a wear element during operation. It is worth paying attention to whether the noise is heard when the pedal is pressed, but disappears when the pedal is released. This indicates a worn clutch release bearing. If the engine speed increases when you press the accelerator pedal vigorously, and the car accelerates with a delay, this is a sign of clutch slipping. Having stopped the vehicle, you should press the brake pedal and try to move off. If the engine does not stall, then the clutch is slipping and a worn or oily pressure plate needs to be replaced. If the clutch jerks, this indicates wear on the pressure plate, an uneven plate surface, or damage to the engine mount. Gears should shift easily and smoothly.

Difficult shifting is a sign of wear on the synchronizers, gears, or sliders. In modern vehicles, gearboxes do not require topping up gear oil. However, it is worth making sure that it is exactly in the gearbox.

A huge number of used cars for sale have high mileage, but mileage meters are usually underestimated. So let's look at the engine. It is true that modern gasoline engines have extended service intervals, but they wear out during operation and this is a natural process. The biggest problem for the buyer is that it is difficult to determine the exact mileage of the car and the associated degree of wear of the drive unit.

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